Home / 2,915.10-4,023.80-1,720.05

Finding the Fourth Proportional to 2,915.10, 4,023.80 and 1,720.05

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Solution

The fourth proportional to 2,915.10, 4,023.80 and 1,720.05 is: 2,374.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.10 : 4,023.80 = 1,720.05 : x
  2. Step 2: Convert to fraction form
    2,915.10/4,023.80 = 1,720.05/x
  3. Step 3: Cross multiply
    2,915.10x = 4,023.80 × 1,720.05
  4. Step 4: Simplify right side
    2,915.10x = 6,921,119.95
  5. Step 5: Solve for x
    x = 6,921,119.95/2,915.10
  6. Step 6: Final answer
    x = 2,374.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.